20835043 has 2 divisors, whose sum is σ = 20835044. Its totient is φ = 20835042.

The previous prime is 20835041. The next prime is 20835049. The reversal of 20835043 is 34053802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20835043 - 2¹ = 20835041 is a prime.

Together with 20835041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20834999 and 20835017.

It is not a weakly prime, because it can be changed into another prime (20835041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10417521 + 10417522.

It is an arithmetic number, because the mean of its divisors is an integer number (10417522).

Almost surely, 2^20835043 is an apocalyptic number.

20835043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20835043 is an equidigital number, since it uses as much as digits as its factorization.

20835043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20835043 is about 4564.5419266340. The cubic root of 20835043 is about 275.1681307953.

Adding to 20835043 its reverse (34053802), we get a palindrome (54888845).

The spelling of 20835043 in words is "twenty million, eight hundred thirty-five thousand, forty-three".